Grate structure



3 Sheets-Sheet 1 0 000 a o o 0 0 0 00 J. G. GIBSON, JR

GRATE STRUCTURE Filed Aug. 17 1921 00000000000 c o o o o u o o o o o wNov. 13 1923.

Nov. 13, 1923. HAT/3,84%

J. G. GIBSON-JR GRATE STRUCTURE Nov. 13, E923. 11,473,846

J. G. GIBSON, JR

GRATE STRUCTURE Filed Aug. 17. 1921 3 Sheets-Sheet 5 Patented Nov. 13,1923.

GEATE STRUCTURE.

Application filed August 17, 1921. serial No. 492,940.

To all whom 2'15 may concern:

Be it known that 1, JOHN G. GinsoN, Jr., a citizen of the United States,residing at Atlantic City, in the county of Atlantic and State of NewJersey, have invented certain new and useful lniproven'ients in GrateStructures, of which the following is a specification.

One object of my present invention is to provide an improved gratestructure which can be used with advantage in conneotion with fu naces,boilers and heaters and which will be so constructed that it will supplyair in an im roved and novel manner capable of effectingapracticallyconiplete combustion of the fuel.

Another object is to include in my invention an improved air cooleddistributer capable of supplyii ig a desired amount of oxygen to ffectthe combustion.

Another object is to so construct Iny iniproved structurethat the gratebar body can be supplied with water so as to keep said body o parativelycool and prevent the same from readilybu'rning out.

A further object is to so construct my improved structure tliat it canbe manufactured and installed at a low cost and will be durable.

These objects, and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which Figure 1 is a top plan View of agrate structure einbodying my invention,

Figure 2 is an enlarged section of said structure taken on the line 2 -2of Figure 1,

F igure 3. is atop plan View of one of the air cooled distributinginenrbers which is made in accordance with 111) inv Figure '51- is aninverted plan \i said member,

Figure Fris an end elevation of said incinher,

Figure (a'is a sectional view of said. incinber taken on. the line 6 6of Figure 3,

Figure 7 is a side elevation of said ineniber,

Figure is a section of said member talten on the line 8 8 of Figure 3,

Figure 9 is a top plan View showing the body of the grate cast in onepiece and differing from the form of the grate body illustrated inFigure 1 in which the bar the body of the grate cast integral with a.

sectional boiler,

Figure 12 is a section taken on the line 12-'-l2 of. Figure 11, and

Figure 13 is an enlarged fragmentary section taken on the line 13-13 oiFigure 1.

Referring to the drawings and particularly to Figures 1 to 8 inclusive,18 represents the bod of a grate which includes hollow supports 1 1provided with openings 15 for attachment f pipes for admission of waterfor cooling purposes. The supports are arranged side by side, arepreferably T-shaped at their ends, as indicated at 16, and are placedwith their T-shaped ends abutting each other as shown in Figure 1.

In transrerse section as shown in Figure 2 the supports 14 are of lesswidth at their tops 18 than at their bottoms 19 and ledges or shoulders20 are produced between the tops 18 and bottoms 19; said ledgesextending outwardly from the side surfaces 21 oi? the top parts of thesupports to the side surfaces 22 which are below the top parts 21.

By constructing the grate bot 7 portion 13 as above described, a space23 is provided between the opposed side surfaces 22 of adjacent supports14: said space extending between the inner surfaces 24 of the e:\'-tensions. These spaces 23 are open at their top and bOftOiYl and it iswithin these spaces that I insert in improved air cooled distribut' bars25 which are preferably made oi. cast metal. ilacb of the bars 25 asclearly shown in detail in Figures 3 to S inelusii'e hes a top plateportion 26 which is ed hori' fully and from. which (le 7 v twolongitudinal flanges having their ends ]0lli(i so as toiorui a co?iiiuous skirt flange 27. The top plate poi ion 26 ex lielldbl:ii.&$!21llV beyond the outside oi the skirt flange 27" to proriitle a.lziteial flange 28 which is preferably in the same plane the lG-1l1a1.l1li1" part of the top plate portion 26. Immediately below thelateral flange 28 is a shoulder 29, the outer surface 30 of which islocated inwardly from the outer edge surface 81 of the lateral flange28. The shoulder 29 has recesses 32 at distances apart which leadupwardly from the under surface 33 as clearly shown in Figure 7. Thelateral flange 28 has notches or cut-out portions 34: at distances apartleading inwardly from the outer surface 31.

The plate portion 26 has rows of upright perforations 35 which leadoutwardly from the chamber 36 formed bv the skirt flange 27 and inclinedperforation 37 lead outwardly from the chamber 36 as clearly shown inFigures 2 and 6.

1 preferably construct the parts so that the distance between the bottomsurface 33 of the shoulder 29 and the top surface of the plate portion26 s substantially equal to the distance between the ledge and the topsurface of the grate body 13 so that the plate portion 26 will fit flushwithin the space between the side surfaces 21 of the top of theadjacent; supports and between the surfaces 26L of the ends of thesupports as clearly shown in Figures 1 and 2.

The skirt flange 27 is of less width and length than the space 23 andwhen the distributing bars are placed in position there will be a spacelJQtWBGILtl'lG outer side and end surfaces of each skirt flange and thegrate body; such space being shown at a: in

Figures 2 and 13.

ith the construction above described, when the bars are placed inposition the shoulders will rest on the ledges 20 and the recesses32will be in communication with the space :0 surrounding each skirt flangeand the recesses will also be in communication with the channel spaceindicated at 3/ between the surfaces 30 and the side surfaces 21 of thesupports 14- whichare immediately below the lateral flange 28, and sincethe notches extend from the top to the bottom of said lateral flanges,these notches will be in communication with the channel space 1 be tweenthe distributing members and the grate body. It will be noted furtherthat the hannel space 7 entirely surrounds the shoulder and thus air canpass upward through the space a, then through the recesses 32 into thechannel 1 and then upwardly through the notches to the fuel. Air canalso pass upwardly through the chamber 36 and through the perforationsand 37; the air which passes through the perforations 35 being directedin an approximately vertical direction while the air which passesthrough the perforations 37 will be deflected at a slantcver the'tops ofthe supports 14:. Thus the fuelabove the grate can be supplied with anabundance of oxygen and the distributing bars will be kept comparativelycool due to the fact that they are practically surrounded by air space,and any heat imparted to the distributing bars and to the grate bodywill be taken up by the air o that the air whendelivered into the fuelIn Figures 9 and 10, I have shown a grate body 13 which is similar tothe grate body 13 above described with the exception that the supports14: are all cast in one piece. In all other respects the construction issimilar to that above described inconnection with the grate'body l3 andI have given similar parts corresponding reference characters" with theexponent a.

In Figures 11 and 12-, I haveshown the supports Lt cast integral withthe sections 38 of a boiler 39 and my improved distributing bars canbepositioned between the supports 14 in the same manner as abovedescribed in connection with Figures '1 to 8 inclusive. The similarparts are given corresponding reference characters with the exponent 0.Y

While I have described my invention 'as taking a-particular form, itwillbe understood that the various parts of my invention may be chan "edwithout: departing from the spirit thereof, and hence I do not limitmyself to the precise construction set forth, 7

but consider that I am at liberty to make such changes and alterationsas fairly come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is 1. A grate structure including supportsspaced from each other in a portion of their length and provided withledges; a top plate positioned upon the ledges between the supports andprovided with air passages, and a continuous skirt flange depending between the supports and spaced form air passages.

,2. A grate structure comprising supports provided with ledges; a topplate having vertical-and inclined airpassages; a lateral flangeextending from the top plate and pro- 7 .vided with air passages; askirt flange depending from the top plate and spaced from the supportsto form air passages, and a shoulder on the skirtfia-nge resting on theledges andhaving recesses formin air pas sagesj.

A grate structure comprising supports provided with ledges; a top platehavin vertical and inclined air passages; a lateral flange extendingfrom the top plate and having notches .forming air passages; a skirtflange depending from the top plate and spaced from the supports'toform. air passages, and a-shoulder on the skirt flange resttherefrom toi ing on the ledges and having recesses forming air passages.

4:. A grate structure including supports spaced from each other andprovided with ledges and a top plate positioned between the supportshaving a perforated center and notched edges forming air passages, andshoulders resting on the ledges with air passages between it and theledges and an air passage, between the shoulder and the support,communicating with the last mentioned air passages and the notches.

5. A grate structure including supports spaced from each other in aportion of their length and provided with ledges; a top plate positionedbetween the supports, having a perforated center and notched edges toform air passages, and shoulders resting on the ledges and havingrecesses forming air passages, the shoulder being positioned to form anair passage communicating with the recesses and the notches, and aflange depending from the top plate between the supports to form an airpassage leading to the recesses and an air passage to the perforations.

6. A grate structure including hollow supports having T-shaped endsabutting each other and provided with ledges; a top plate positionedupon the ledges between the sup ports and provided with air passages,and a continuous skirt flange depending from the plate between thesupports to form air passages. In testimony whereof I have signed myname to this specification in the presence of two subscribing witnesses.

JOHN G. GIBSON, JR. Witnesses:

Gno. D. CoNNoR, LEONARD P. PARSONS.

